Both Writer and Calc on my Macbook sometimes get the busy cursor for a long time, almost as if swapping terribly on a slow disk. But I have eight gig of RAM and a half-full one terabyte SSD. Might be a Mac problem. Whatever.
Today, I opened a document that already had my styles defined, deleted most of the old text, saved it to a new name, and spent two or three hours composing new stuff. Then the entire Mac froze and I had to force power-off. When I rebooted, the new document did not appear in the recovery window.
I found the new document and opened it. No changes since the Save As. But preferences says to save auto recovery data every ten minutes. Is that data in some secret place I can dig out and use in some way?